There are plenty of use cases for this. Graphic Designers could benefit the most from documentation on things like Adobe Software, Gimp, and Inkscape. Wouldn’t it be nice for people to be taken step by step with examples and images instead of having experienced designers try to explain basic concepts with what little time they have and thus mostly with text?
I think this would be a great comprehensive resource that could be very reliable after collaborators had their way with it. This would also help cut down on common/duplicate questions as well as keeping the new questions more focused on less common issues that need really specific answers.
here is a link to the tour for Documentation on Stack Overflow.